Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Face tracking in a camera processor

a camera processor and face tracking technology, applied in the field of improvement, can solve the problem of minimal processing power available for value added processing, and achieve the effect of high resolution, low resolution, and high threshold for accepting a fa

Inactive Publication Date: 2009-03-26
FOTONATION LTD
View PDF109 Cites 125 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]It is desired to have an improved method of face tracking in a digital image acquisition device.

Problems solved by technology

Furthermore, typically most of the processing power available to the host processor 12 is required to run the face tracker application, leaving minimal processing power available for carrying out value added processing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Face tracking in a camera processor
  • Face tracking in a camera processor
  • Face tracking in a camera processor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021]Face tracking for digital image acquisition devices include methods of marking human faces in a series of images such as a video stream or a camera preview. Face tracking can be used to indicate to a photographer, locations of faces in an image or to allow post processing of the images based on knowledge of the locations of the faces. Also, face tracker applications can be used in adaptive adjustment of acquisition parameters of an image, such as, focus, exposure and white balance, based on face information in order to produce improved the quality of acquired images.

[0022]In general, face tracking systems employ two principle modules: (i) a detection module for locating new candidate face regions in an acquired image or a sequence of images; and (ii) a tracking module for confirming face regions.

[0023]A well-known method of fast-face detection is disclosed in US 2002 / 0102024, incorporated by reference, hereinafter Viola-Jones. In Viola-Jones, a chain (cascade) of 32 classifier...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method operable in a digital image acquisition system having no photographic film is provided. The method comprises receiving a relatively low resolution image of a scene from an image stream, wherein the scene potentially includes one or more faces. At least one high quality face classifier is applied to the image to identify relatively large and medium sized face regions and at least one relaxed face classifier is applied to the image to identify relatively small sized face regions. A relatively high resolution image of nominally the same scene is received and at least one high quality face classifier is applied to the identified small sized face regions in the higher resolution version of said image.

Description

FIELD OF THE INVENTION[0001]The present invention provides an improved method and apparatus for image processing in acquisition devices. In particular, the invention provides improved face tracking in a digital image acquisition device, such as a camera phone.BACKGROUND[0002]FIG. 1 illustrates digital image acquisition apparatus, for example a camera phone. The apparatus 10 comprises an Image Signal Processor, ISP, 14, which is in general, a general purpose CPU with relatively limited processing power. Typically, the ISP 14 is a dedicated chip or chip-set with a sensor interface 20 having dedicated hardware units that facilitate image processing including image pipeline 22. Images acquired by an imaging sensor 16 are provided to the ISP 14 through the sensor interface 20.[0003]The apparatus further comprises a relatively powerful host processor 12, for example, an ARM9, which is arranged to receive an image stream from the ISP 14.[0004]The apparatus 10 is equipped with a display 18,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06K9/00
CPCG06K9/6857G06K9/00228G06V40/161G06V30/2504
Inventor BIGIOI, PETRONELPOSOSIN, ALEXEIGANGEA, MIHNEAPETRESCU, STEFANCORCORAN, PETER
Owner FOTONATION LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com